linux-kernel - Re: [PATCH v3 3/3] riscv: dts: starfive: add tdm node and sound card

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Date:   Wed, 10 May 2023 10:33:51 +0200
From:   Emil Renner Berthing <emil.renner.berthing@...onical.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     Walker Chen <walker.chen@...rfivetech.com>,
        Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor.dooley@...rochip.com>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v3 3/3] riscv: dts: starfive: add tdm node and sound card

On Tue, 9 May 2023 at 20:05, Conor Dooley <conor@...nel.org> wrote:
>
> On Tue, May 09, 2023 at 08:52:48PM +0800, Walker Chen wrote:
> > Hi Conor/Emil,
> >
> > DT overlay is used to describe combinations of VF2 and hat.
> > Do you have any comments on this patch ?
>
> Up to Emil :)
>
> I seem to recall that he said at the linux-riscv sync-up call that we
> have* that he was not in favour of overlays for hats like this.
> I'll let him confirm that though, I might very well be misinterpreting or
> misremembering what he said.

What probably meant was that I didn't want a bunch of different device
trees for each combination board * hat. An overlay makes a lot more
sense. However, looking through the kernel tree there is a surprising
lack of overlays for hats committed already, so I suspect there is
some sort of policy around overlays already in place.

> Cheers,
> Conor.
>
> * https://lore.kernel.org/linux-riscv/mhng-775d4068-6c1e-48a4-a1dc-b4a76ff26bb3@palmer-ri-x1c9a/